sum for k=1 to 2024 of (2023 - 2022 cos(pi(2k-1)/2024)) / (2021 - 2020 cos(pi(2k-1)/2024))sum for k=1 to 2024 of (2023 - 2022 cos(pi(2k-1)/2024)) / (2021 - 2020 cos(pi(2k-1)/2024))

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